Periodic table block

d-block elements

The d-block occupies the middle of the periodic table, groups 3 to 12, where d subshells fill. A d subshell holds up to ten electrons, making the block ten groups wide. Its members are the transition metals: hard, dense, high melting metals with variable oxidation states and strong catalytic ability.

At a glance

Elements
40
Atomic numbers
21 to 112
Block
d-block
Periods
4, 5, 6, 7
Phase at STP
solid (29), liquid (1)

Shared properties

  • Electrons fill a d subshell, which holds up to ten electrons
  • Spans groups 3 through 12 in the middle of the table
  • Members are transition metals with multiple oxidation states
  • Known for colored compounds, magnetism and catalysis

The 40 elements

All 4 blocks

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